<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>参数管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
    <!-- 警告区域 -->
    <el-alert show-icon title="注意: 只允许为第三级分类设置相关参数!" type="warning" :closable="false">
    </el-alert>

    <!-- 商品分类区 -->
    <el-row class="cat_opt">
        <el-col>
            <span >选择商品分类：</span>
            <!-- 选择商品的联级选择框 -->
            <el-cascader expand-trigger="hover" v-model="selectedCateKeys" :options="cateList" :props="catePros"
              @change="handleChange">
             </el-cascader> 
        </el-col>
    </el-row>

    <!-- tab页签区 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 动态面板 -->
    <el-tab-pane label="动态参数" name="many">
        <el-button @click="addDialogVisible=true" type="primary" size="mini" :disabled="isBtnDisable">添加参数</el-button>
        <!-- 动态参数表格 -->
        <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环tag标签 -->
               <el-tag  v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)"  >
                {{item}}
              </el-tag>
              <!-- 输入文本框 -->
              <el-input
                 class="input-new-tag"
                 v-if="scope.row.inputVisible"
                 v-model="scope.row.inputValue"
                 ref="saveTagInput"
                 size="small"
                 @keyup.enter.native="handleInputConfirm(scope.row)"
                 @blur="handleInputConfirm(scope.row)">
            </el-input>
            <!-- 添加按钮 -->
         <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="名称参数" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
                <template slot-scope="scope">
                   <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                   <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-tab-pane>
       <!-- 静态属性 -->
    <el-tab-pane label="静态属性" name="only">
        <el-button @click="addDialogVisible=true" type="primary" size="mini" :disabled="isBtnDisable">添加属性</el-button>
                <el-table :data="onlyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环tag标签 -->
               <el-tag  v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)"  >
                {{item}}
              </el-tag>
              <!-- 输入文本框 -->
              <el-input
                 class="input-new-tag"
                 v-if="scope.row.inputVisible"
                 v-model="scope.row.inputValue"
                 ref="saveTagInput"
                 size="small"
                 @keyup.enter.native="handleInputConfirm(scope.row)"
                 @blur="handleInputConfirm(scope.row)">
            </el-input>
            <!-- 添加按钮 -->
         <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
              </el-table-column>    
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
                <template slot-scope="scope">
                   <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)" >编辑</el-button>
                   <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-tab-pane>
  </el-tabs>
    </el-card>
    <!-- 修改参数的对话框 -->
    <el-dialog
      :title="'添加'+titleText"
      :visible.sync="addDialogVisible"
      width="50%" @close="addDialogClosed">
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" >
  <el-form-item :label="titleText" prop="attr_name">
    <el-input v-model="addForm.attr_name"></el-input>
  </el-form-item>
    </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams()">确 定</el-button>
      </span>
</el-dialog>
    <!-- 添加参数的对话框 -->
        <el-dialog
      :title="'修改'+titleText"
      :visible.sync="editDialogVisible"
      width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px" >
  <el-form-item :label="titleText" prop="attr_name">
    <el-input v-model="editForm.attr_name"></el-input>
  </el-form-item>
    </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams()">确 定</el-button>
      </span>
</el-dialog>
  </div>
</template>

<script>
export default {
    name:'Params',
    data() {
    return {
        cateList:[],
        catePros:{
          value:'cat_id',
          label:'cat_name',
          children:'children'
        },
        //级联选择框双向绑定到的数组
        selectedCateKeys:[],
        activeName:'many',
        manyTableData:[],
        onlyTableData:[],
        addDialogVisible:false,
        inputVisible:false,
        addForm:{
            attr_name:''
        },
        addFormRules:{
        attr_name:[{ required: true, message: '请输入参数名称', trigger: 'blur' },]
        },
        editDialogVisible:false,
        editForm:{},
        editFormRules:{
           attr_name:[{ required: true, message: '请输入参数名称', trigger: 'blur' },] 
        },
    }
  },
    created() {
        this.getCateList()
    },
    methods:
    {
      async getCateList()
      {
          const{ data:res }=await this.$http.get('categories')
          if(res.meta.status!==200)
          {
              return this.$message.error('获取商品列表失败!')
          }
          console.log(res.data)
          this.cateList=res.data
      },
      handleChange()
      {
       this.getParamsData()
      },
      handleTabClick()
      {
         this.getParamsData()
      },
     async getParamsData()
      {
       if(this.selectedCateKeys.length!==3){
           this.selectedCateKeys=[]
           this.manyTableData=[]
           this.onlyTableData=[]
           return
       }
       //获取动态参数
    const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,
    {
        params:{sel:this.activeName}
    })

    if(res.meta.status!==200)
    {
        return this.$message.error('获取参数列表失败！')
    }
    
    res.data.forEach(item=>{
      item.attr_vals=item.attr_vals?
      item.attr_vals.split(' '):[]
      item.inputVisible=false
      item.inputValue=''
    })
    console.log(res.data)
      //判断参数属于动态还是静态
      if(this.activeName==='many')
      {
          this.manyTableData=res.data
      }
      else{
          this.onlyTableData=res.data
      }
      },
      addDialogClosed()
      {
          this.$refs.addFormRef.resetFields()
      },
      addParams()
      {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName
          }
        )

        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败！')
        }

        this.$message.success('添加参数成功！')
        this.addDialogVisible = false
        this.getParamsData()
              
          })
      },
     async showEditDialog(attr_id)
      {
          const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,
          {
           params:{attr_sel:this.activeName}
          })
          if(res.meta.status!=200)
          {
              return this.$message.error('获取参数信息失败！')
          }
          this.editForm=res.data
         this.editDialogVisible=true
      },
      editDialogClosed()
      {
      this.$refs.editFormRef.resetFields()
      },
      editParams()
      {
          this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败！')
        }

        this.$message.success('修改参数成功！')
        this.getParamsData()
        this.editDialogVisible = false
      })
      },
     async removeParams(attr_id)
      {
    const confirmResult= await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)

        if(confirmResult!=='confirm')
        {
            return this.$message.info('取消了删除!')
        }

        const {data:res}=await this.$http.delete(
            `categories/${this.cateId}/attributes/${attr_id}`
        )

        if(res.meta.status!==200)
        {
            return this.$message.error('删除参数失败！')
        }
        this.$message.success('删除参数成功！')
        this.getParamsData()
      },
     async handleInputConfirm(row)
      {
        if(row.inputValue.trim().length===0)
        {
          row.inputValue=''
          row.inputVisible=false
          return
        }
       //没有return说明输入了内容
       row.attr_vals.push(row.inputValue.trim()
       )
       row.inputValue=''
       row.inputVisible=false
       this.saveAttrVlas(row)
      },
     async saveAttrVlas(row)
     {
//发起请求，编辑服务器上的数据
       const{data:res}=await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
       {
         attr_name:row.attr_name,
         attr_sel:row.attr_sel,
         attr_vals:row.attr_vals.join(' ')
       }
       )
       if(res.meta.status!==200)
       {
         return this.$message.error('修改参数项失败！')
       }
       this.$message.success('修改参数项成功！')
     },
      showInput(row)
      {
         row.inputVisible=true
         //$nextTick作业时放页面渲染时才能执行函数回调的方法
        this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
       
      },
      //删除
    handleClose(i,row)
    {
      row.attr_vals.splice(i,1)
     this.saveAttrVlas(row)
    }
    },
    computed:{
        isBtnDisable()
        {
            if(this.selectedCateKeys.length!==3)
            {
                return true
            }
            return false
        },
        cateId()
        {
            if(this.selectedCateKeys.length===3)
            {
                return this.selectedCateKeys[2]
            }
            return null
        },
        titleText()
        {
            if(this.activeName==='many')
            {
                return '动态属性'
            }
            return '静态属性'
        }
    }
}
</script>

<style scoped>
.cat_opt{
    margin: 15px 0;
};


</style>